Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 109
- joining it, so as to formcurved lines of a peculiarcharacter. This experi-ment may be performed11 a still more satisfactory manner, by supporting thepaper, with the magnet in contact with its undersurface, and then showering down iron sand or iron Fig. 49 … MAGNETIC CURVES. 93 filings from a sand-box held some inches above.The particles of iron, as they strike the paper, canthus more readily assume the positions to whichthey tend under the magnetic influence. 147. The lines formed by the filings afford a goodexperimental illustration of what are…
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